Merge branch 'rspec' into 'master'

Rspec

See merge request !407

spec/acceptance/statistics_spec.rb

+require 'acceptance_helpers'
+require 'shared/contexts'
+
+resource 'Statistics' do
+  before { 12.times { create(:learning_object) } }
+
+  let(:learning_objects) { LearningObject.all }
+
+  get '/v1/statistics' do
+
+    before do
+      create(:download, user: @user, downloadable: learning_objects.first)
+    end
+
+    example 'Showing plataform statistics' do
+      do_request
+      expect(status).to eq(200)
+    end
+  end
+
+end

spec/factories/download.rb

+FactoryGirl.define do
+  factory :download do
+    downloadable
+    ip { Faker::Internet.ip_v4_address }
+    user
+  end
+end

spec/factories/learning_objects.rb

 FactoryGirl.define do
-  factory :learning_object, aliases: [:complainable, :reviewable, :stageable, :subjectable, :likeable, :collectionable, :bookmarkable] do
+  factory :learning_object, aliases: [:complainable, :downloadable, :reviewable, :stageable, :subjectable, :likeable, :collectionable, :bookmarkable] do
     sequence(:name) { |i| "LearningObject #{i}" }
     sequence(:id_dspace) { |i| i }
     publisher